[Boatanchors] Mohawk Question

Sun, 13 Oct 2002 14:17:34 -0700

Hi Bill,
You may have an oscillation occurring when the gain is increased. Can you
look at the output of the last IF stage with a scope to see if the amplitude
of the signal abruptly increases, and the modulation gets swamped out? If so
you probably have a by-pass cap that failed.

-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Bill Roberts
Sent: Sunday, October 13, 2002 3:08 PM
To: Heathkit QTH Reflector; BoatanchorsReflectorQTH
Subject: [Boatanchors] Mohawk Question

Folks,

The Mohawk I picked up on eBay appears to have a unique problem...  too much
sensitivity.  If I turn the RF and IF gain all the way, the S-meter pegs and
it appears to overload.  I suspected a problem in the AGC/AVC circuit (i.e.
a bad tube holding AVC voltage down).  All tubes test OK.  I did notice that
it is impossible to zero the S-meter (bad tube or component out of range).

Any ideas before I tear into it?

Thanks.

Bill / K8DXX

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